Cutting and mixing machine



March 18, 1930.4` c. QFFENHAUSERl CUTTING AND MIXING MACHINE` March 18,1930. ci oFFENHAusER CUTTING `AND MIXING MACHNE Filed my 5, 192s vsheets-sheet 2 INVENTOR K ff/IM ATTORNEY March 18, 1930. c.oFFl-:NHAUSER 1,750,645

CUTTING AND MIXING HCHlNE v19d July 5, 928 5 Sheets-Sheet '5 PatentedMar. 18, 1930 UNITED STATES PATENT OFFICE CUTTING AND MIXING MACHINEApplication led July 5, 1928.

The object of this invention is to devise a novel cutting and mixingmachine in which novel means are provided for effecting the circulationof the material or materials 'being treated, and novel means fordischarging it under pressure from the machine.

With the above and other objects in view as will hereinafter moreclearly appear, my invention comprehends a novel construction andarrangement of a cutting and mixing machine which can be used for eithercutting 0r mixing or for both cutting and mixing.

It further comprehends a novel cutting and mixing machine wherein a pairof feed members are disposed side by side and driven in oppositedirections and between these side members is disposed a third feedmember which can be revolved in a forward or a reverse direction.

It further comprehends a novel machine of the character herein set forthwhere novel means are provided for discharging the material underpressure from the machine.

Other novel features of construction and advantage will hereinafter moreclearly appear in the detailed description and the appended claims.

For the purpose of illustrating the invention, I have shown in theaccompanying :o drawings a typical embodiment of it, which, in practice,will give reliable and satisfactory results. It is, however, to beunderstood that this embodiment is typical only and that the variousinstrumentalities of which my invention consists can be variouslyarranged and organized, and that the invention is not limited to theprecise arrangement and organization of these instrumentalitiesas hereinset forth.

Figure 1 is a top plan view with the cover removed of a cutting andmixing machine embodying my invention.

Figure 2 is a section on line 2-2 of Fig- 5 ure 1.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 4 4 of Figure 2 with the feed screwsremoved.

5o Figure 5 is a partial Section of the Casing Serial No. 290,447.

showing in elevation, a bearing member employed.

Figure 6 is a plan view of a gate.

Figure' is a section on line 7-7 of Figure 5 of the bearing seen inFigure 5. 55

Figure 8 is a section on an enlarged scale on line 2--2 of Figure 1,showing more particularly the compression feed screw and the manner inwhich it interlocks with the central feed screw to be driven thereby.

Figure 9 is an elevation of an apertured disc and its retaining cap.

Figure 10 is an elevation of the apertured disc seen in Figure 9 indetached position.

Figure 11 is an elevation of the knife.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings 1 designates the casing of a cutting andmixing machine embodying my invention. 7G The casing is preferablyformed' from an integral casting and is provided with a removable cover2 of any desired construction. As illustrated, the casing issubstantially U shaped in cross section, the opposite side 75 wallsbeing substantially straight and it is preferably of much greater lengththan width in order that the proper mixing of the material or materialsbeing treated can be effected. S0

The opposite side walls are preferably substantially parallel and at thecentral portion at the bottom, the casing is preferably rounded asindicated at 3, see Figure 4, and such rounded portion merges into therounded portions 4 and 5 at the bottom of the casing. The casing isprovided at one end with a partition 6 which contributes with the wallsof the casing to form a mixing chamber 7 for the material to be treated.This par'- tition also contributes with the walls of the casing to forma gear chamber 8 within which is contained the driving mechanism.

9 designates the main driving shaft which 95 is suitably journalled, andon this driving shaft is fixed a gear 10 which meshes with the gear 11fixed to the shaft 12 which is journalled in an end wall of the casingand the partition 6, and its forward end extends 100 through theartition 6 and is provided with the opposite y directed hooks 13.

The shaft 12 has also fixed to it a gear 15 which meshes with a gear 16fixed to a. shaft 17 suitably journalled.

The forward end ofthe shaft 17 is constructed in a similar manner tothat of the shaft 12 having a head provided with hooks 14 as will beunderstood from the description already given. y

19 designates a shaft suitably journalled, and on this shaft is mounteda clutch collar 20 with which cooperates a clutch lever 21 which extendsinto a position accessible to the operator of the machine.

The clutch collar 20 is keyed or splined to the shaft 19 and carries thegears 22 and 23, the gear 22 being adapted to be brought into mesh withthe gear 11 on the shaft 12 and the gear 23 being adapted to be movedinto mesh with a gear 24 fixed to the shaft 17, see Figure l.

The shaft 19 has fixed to it a gear 25 which meshes with a gear 26having an extended hub 27 and loosely mounted on a sectional shaft 28,one section of which is journalled in the partition 6.

The drive shaft 9 has fixed to it a sprocket wheel 29 around whichpasses a sprocket chain 30 which also passes around a sprocket wheel 31fixed to the inner section of the shaft 28.

The hub 27 loosely mounted on the shaft 28 is provided with theoppositely directed hooks 32 to receive one end of a central feed screw33. This central feed screw 33 at its forward end is detachablyconnected with the hooks 34 which are secured to the flanged end of ahollow shaft 35. This hollow shaft 35 has a bearing in a bearing post36, see more particularly Figures 5 and 7, from which it will be seenthat this bearing at its rear end has its side walls convergingrearwardly as at 38 and is provided with the slots 39. The

. slots 39 are vertically disposed and adapted to receive a. gate 40which is provided with the grasping handle 41 and which is recessed atits lower end as at 42. This gate substantially closes the opening 43leading to the chamber 44 within the casing 45 of the cutting mechanism.The shaft 28 extends through this casing and has connected with it acompressor feed screw 46 the shaft of which is interlocked as at 47 withthe shaft The inner wall of the chamber 44 converges towards its outerend. The shaft 28 'has keyed to it a cutter 48 of any desired orconventional type which revolves in proximity to a stationary apertureddisc 49 which is secured in place by means of a cap 50 screwed tothe,casing 45. This cap 50 is provided on its outer face with the guides51 and a stop lug 52 in order to adapt it to receive a forming spout 53having the discharge opening 54 of a desired contour so that the outmaterial discharged will be of a desired form.

The forward end of the side feed screws 55 and 56 are guided by means ofthe bolts 57 carried by the end wall of the casing and entering anaperture in the end portion of a feed screw. rl`he rear ends of the feedscrews are adapted to pass between and be engaged by their respectivehooks such as 13 and 14.

The gate 40, if desired, may be provided with the guides 58. i

In order that the material within the mixing chamber can be maintainedat a desired temperature, I provide the bottom wall of such chamber witha chamber 59 having communicating with it a pipe 60 and with the chamber61 having communicating with it a pipe 62 so that a temperature changingmedium may be introduced into the chambers 59 and 61. These chambers 59and 61 may be separate chambers but they preferably communicate witheach other at each end and the pipes 60 and 62 serve as a filling anddischarge means so that either a heating or cooling medium can becirculated through the chambers 59 and 61.

In the operation, the material to be treated is placed in the chamber 7at any desired point and if the material is only to be mixed the gate 40is closed.

The two side feed members 55 and 56 revolve in opposite directions andthe central feed screw can be revolved in either a clockwise or acounter-clockwise direction as may be desired. It will thus be seen thatthe material will be fed forwardly through the right hand feed channeland at the outer end of such feed channel will be discharged into theopposite side channel and be fed rearwardly and then again be dischargedat the rear end of the left hand feed channel to the right hand feedchannel. The material will also be circulated at the central portion ofthe feed channel so that there will not be any 'dead spots in the mixingchamber, or in other words the entire mass of material will becontinuously moved.

As soon as the desired mixing action has taken place, the gate 40 israised and the clutch sleeve 2O is shifted if necessary to cause theshaft 28 to revolve in a right hand direction and the material will befed from the mixing chamber 7 and will pass into the compressor chamber45 to the cutter 48 and the material will be cut and be dischargedthrough the forming spout 53. The discharge end of this spout 53 mayhave any desired conformation so that the material can be discharged asa continuous band having any desired contour in cross section.

It will be apparent that the side feed screws can be readily removedwhen it is desired to clean the machine. The central feed screw 33 canbe disconnected and the shaft 28 removed when the cap 50 and the feedscrew 46 are removed.

The knife is readily replaceable upon removal of the cap 50, andinterchangeable spouts 53 can be employed in accordance with the shapeof the material which is to be discharged from the machine.

It will now be apparent that I have devised a new and useful cutting andmixing machine which embodies the features of advantage enumerated asdesirable in the statement of the invention and the above description,and while I have, in the present instance, shown and described apreferred embodiment thereof which will give in practice satisfactoryand reliable results, it is to be understood that this embodiment issusceptible of modification in various particulars without departingfrom the spirit or scope of the invention or sacrificing any of itsadvantages.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent, is

1. In a cutting and mixing machine, a chambered casing, a pair of feedmembers disposed side by side in said casing and adapted to feed inopposite directions, an intermediate feed member contributing with thecasing to form when in operation two feed channels, and actuating meansfor said feed members.

2. In a cutting and mixing machine, a chambered casing, a pair of feedmembers disposed side by side therein and adapted to revolve in oppositedirections, an intermediate feed member disposed between and below saidpair of feed members, and driving mechanism to effect the feed of saidpair of feed members and to cause said intermediate feed member torevolve in a forward or a reverse direction.

3. In a cutting and mixing machine, a chambered casing, a pair of feedmembers disposed side by side therein and adapted to revolve in oppositedirections, an intermediate feed member contributing to form two feedchannels, cutting mechanism, and driving mechanism for said feed membersand cutting mechanism.

4. In a. cutting and mixing machine, a chambered casing, a pair of feedmembers disposed side by side therein and adapted to revolve in oppositedirections, an intermediate feed member contributing to form two feedchannels, cutting mechanism, driving mechanism for said feed members andcutting mechanism, and means to prevent the material, being treated,from passing to said cutting mechanism.

5. In a cutting and mixing machine, a casing having a longitudinallyextending substantially U shaped chamber therein, a pair oflongitudinally extending feed screws disposed side by side in saidchamber, an intermediate feed member in said chamber and contributingwhen in operationto form two feed channels, said casing having a.discharge spout, cutting mechanism in said spout, means to feed thematerial in said casing under pressure to said cutting mechanism anddriving means for said feed members, cutting mechanism and pressurefeeding means..

6. In a cutting and mixing machine, a casing having a mixing chamber anda delivery spout forming a cutting chamber, two helical feeding membersdisposed side by side in said mixing chamber, an intermediate feedmember in said mixing chamber in alignment with said delivery spout,cutting mechanism at the discharge end of said spout, means to feedmaterial under pressure to said cutting mechanism, and actuating meansfor said feed members. l

7. In a cutting and mixing machine, a casing having a mixing chamber,material circulating means in said chamber comprising three spaced feedmembers arranged in parallelism, a delivery spout at one end of saidcasing, cutting mechanism at one end of said spout, driving means forsaid feed members and cutting mechanism, and reversing mechanism for oneof said feed members.

8. In a cutting and mixing machine, a casing having a mixing chamber,material circulating means in said chamber comprising three spaced feedmembers arranged in parallelism, a delivery spout at one end of saidcasing, cutting mechanism at one end of said spout, driving means forsaid feed members and cutting mechanism, reversing mechanism for one ofsaid feed members. and a former through which the cut material isdischarged.

9. In a cutting and mixing machine, a casing having a mixing chamber, apair of helical feed screws disposed side by side in said chamber andconnected to revolve in opposite directions, a central feed screw, saidcasing having a discharge opening, cutting mechanism to which materia-lis fed from said discharge opening, a shaft to actuate said cuttingmechanism, and means to atuate said feed screws and said shaft.

10. In a cutting and mixing machine, a casing having a mixing chamberprovided with a discharge opening, a. gate for said opening, cuttingmechanism to which the material is discharged from said opening, sidefeed screws in said chamber connected to revolve in opposite directions,a central feed screw.,means to drive said central feed screw in aforward or a reverse "direction, driving means for said side feedscrews, said feed screws being detachably connected with their drivingmeans, and means to actuate said cutting mechanism.

11. In a cutting and mixing machine,va casing having a mixing chamberprovided with a discharge opening, a gate for said opening, cuttingmechanism to which the material is discharged from said opening,

side feed screws in said chamber connected to revolve in oppositedirections, a central feed screw, means to drive said central feed screwin a forward or a reverse direction, driving means for said side feedscrews, said feed screws being detachably connected with their drivingmeans, means to actuate said cutting mechanism, and a discharge spout toreceive the material from said cutting mechanism and detachablyconnected therewith and the discharge end of said spout being adapted togive a predetermined contour in cross section to the material beingdischarged.

CHRISTOPHER OFFENHAUSER.

